Printer&#39;s roller.



Patented Oat. 29

F.. HLWOLEVER.

PRINTERS ROLLER.

APPLICATION FILED Aus.4. 1915.

L www A ramer ernten,

FRANKLIN H. WOLEVER, 0F CHICAGO, ILLINOIS, SSIGNOR TO IDEAL ROLLER COM-PANY, OFIGHICAGO, ILLINOIS, A. CORPORATION OF DELAWARE.

PRINTER'S ROLLER.

messes.

Specification of Letters Patent.

Patented @et 29, 191%.

Original application led August 18, 1913, Serial No. 785,367, (nowPatent 1,161,756.) Divided and this application led August 4, 1915.Serial No. 43,546.

To all whom t may concern.' l Be it knownr that I, FRANKLIN H. Wei,-EVER, a citizen of the United States, and resident of Chicago, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in Printers llollers; and I do hereby declarethat`the following is a clear, full, and exact description thereof,reference being had to the accompanying drawings, and to the charactersof reference marked thereon, which form par-t of this specification.

rlhis invention relates to a novel compound roller for printing presses,type writ# ing machines, clothes wringersl and other uses, and theinvention consist's in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

A roller embodying my invention embraces a central core of highresiliency and a preferably outer face layer of tough exterior `formedon the core, said core and -face layer being composed largely ofvulcanized oil. o

A roller embodying my invention and constructed in accordance with mynovel process is especially adapted for use as a die.

tributing roller for printing presses, in which use itis subjectedtowide ranges of temperature and humidity, and wherein the jrequirements`are -for a rollerwhich will retain its contour anda uniform hardnessunder -all practical conditions of use and from which ink may be rapidlyand completely removed.

Inasmuch as the conditions of use of a printing press roller are,perhaps, more severe than will be found in any other uses lof suchrollers, emphasis is hereafter made to those qualities which especiallyit the roller for printing pressy use and to comparison of my improvedroller to known rollers.

Heretoforeyarious attempts have beenv made to produce distributingrollers for printin M1 esses of .a character to withstand the varia therollers and variableness 'in diameter both when in use and when storedin the racks;

and also of a character to permit the ink to be readily and completelyremoved there from after use. Such efforts, so far as I am aware,.havenot resulted in a roller possessing thecharacteristics desired.`Consequently, the ink distributing roller of a printlng press has`presented "and now presents a serious problem in practice.

vide a roller of such nature and characteristics that it will not absorbmoisture from the atmosphere under relatively high humidities, such aswill tend to Fcause the roller to become larger in diameter and softerin teX- ture, and which, on the other hand, does not tend to lose itsmoisture when operating in dry temperatures, such as would cause theroller to shrink and harden; either of which conditions will render theroller uniit for its intended use. By producing a roller in which theinterchange of moisture from the atmosphere to the roller, and viceversa, is minimized, I am enabled to avoid distortion and variablenessof size of the roller, which occurs where such interchange isappreciable or substantial. Moreover the absorption or elimination ofmoisture to and from the titl) roller, respectively, does not occuruniformly to be aectedby inks ordinarily used in l printing processes,and which, therefore, may be kept in cleanly and usable condition.

Another object of the invention is to provide a roller which, whenoperated at high speeds and over long periods of time, will' face layeris tough and homogeneous. It is desirable in order to produce this toughor homogeneous outer or face layer that, after the material has beenpoured into the mold,

, and before it solidifies, all the air, gas and moisture or as nearlyas may be, shall be driven therefrom. The roller face is, therefore,anhydrous so that it will not become deformed or shrunken or hardened,by elimination of moisture, and said material possesses no affinity formoisture, s0 that the roller will not become deformed, enlarged andsoftened by the absorption of moisture. An advantage realized in drivingthe air and moisture from the outer layer resides, not only in makingthe layer moisture-proof, but it is also valuable because the surfaceitself is thereby free from air holes and like irregularities.

The roller possessing the characteristics above specified may beproduced by the process set forth in my application Serial No. 785,367,filed Aug. 18, 1913, now U. S. Letters Patent 1, 161,756, `granted onthe23rd day of November, 1915, from which the subject matter of thisapplication has been divided. Said process as disclosed in said patent,consists essentially of the steps of first lining the roller mold with asuitable fusible lining material, thereafter reaming the lining to thedesired interior diameter, thereafter forming against the smooth wall ofthe lining the outer or face layer of the roller and thereafter pouringwithin the hardened o1 set face layer. the material to constitute thebody or core of the roller, the roller stockor shaft being centered inthe mold before the pouring operation..

In thef drawings are shown the essential elements of an approved form ofapparatus for producing my novel roller, wherein- Figure 1 is an axialsection of the mold afterit has been lined.

Fig. 2 is an axial section of the mold showing a reaming device forreaming the lining.

Fig. 3 is an axial section of the mold after the face layer of theroller has been formed against the lining.

Fig. Lfis an axial section of the mold in upright position, with theshaft centered there'in, and after the core material has been poured. Y

Fig. 5 is a perspective view of the finished roller.

Fig. 6 is a cross section thereof.

The roller shown in Figs. 5 and 6 comprises a central body or core 10made of a suitable resilient material, and a face layer 11 whichsurrounds and is bonded to the core and is composed of a homogeneousmaterial, relatively tougher than the core and free from air holes andmoisture Iand anhydrous in character. The material from which the coreis formed may be of any suitable vulcanized oil, such as corn oil. Theface layer 11 of the roller may be made from the same general characterof oil although treated somewhat differently to produce a tough,homogeneous smooth outer face free from air, gases and moisture, forinstance, when the core is made of vulcanized corn oil compound, theface layer` may be made of a vulcanized linseed oilcompound. 12designates a stock or shaft which extends centrally through the rollerand extends beyond 'the ends of the'roller toconstitute the bearingmember for the roller.

The apparatus'shown in the drawings for making the roller consists of amold 14 fitted 9 with a hot water or steam jacket 15 and with removablecaps 16, 17. The cap 17 has an -axial extension 18 to constitute acentral bearing fo-r the mold in a centrifugal machine. The mold may berotated through the-means of hollow lugs 19 in the cap 16 which areengaged by driving lugs 20 attached to a disk 21 constituting part ofthe driving device ofthe centrifugal machine. The axial extension 18 ofthe-cap 17 is provided with a trough 22 through which material is pouredinto the mold. A, series of 'holes 23 may be provided in the cap 16 tolpermit gases to escape from the mold during the molding operation ofthe roller face layer.

The operation of producing the roller con`- sists first of coating thecaps 16, 17 with liquid paraffin or the like and inserting them into theends 0f the mold. Thereafter the mold is centered in a centrifugalmachine with the trough22 opening upwardly. Thereafter the proper amountof hot paraffin or other suitable lining material is introduced throughthe trough into the mold, after which the mold is rotated to throw theparaiin or lining material outwardly against the mold walls to form alining 25 of uniform thickness, the lining solidifying during therotation of the mold. Thereafter the mold is lifted from the centrifugalmachine and the endcaps are removed and the mold placed in a reamingmachine such as is shown in Fig. 2. 4Said machine consists in part of|parallel blades 26, 26 which are pivoted to cross arms 27, 27 that arein turn pivoted to the shaft 28 of the reaming machine. One of theblades is extended at one end for connection toa nut 29 which isscrewthreaded to the shaft 28, Athereby the two blades may be movedinwardly and outwardly in parallel relation to adj ust'them to cut awaymore or less of the lining material and to produce a lining of thedesired interior diameter.` The shavings are drawn out 'from thereaming-machine through an exhaust pipe 30.

After the lining 25 has been reamed the mold is removed from the machineand the end caps replaced. Thereafter the mold is again set up in thecentrifugal machine, and the material for forming the outer face layer,prepared by a partial vulcanizing process, is mixed with a furthervulcanizing agent such, for instance, into the mold after the mold isrotated at a suitably high speed until the compound has been thrownoutwardly against the lining 25 to form the shell or face layer 11.

After the solidilication of the face layer 11 the mold is taken' fromthe centrifugal machine and the end caps removed and the) mold is thenset upright, as shown in Fig. 4, to receive the material which'constitutes the core 10 of theroller.` Before the core material has beenpoured into the tubular face layer, the roller stock or shaft l2, fittedwith a head bushing 32 and with a foot bushing 33 is centered in themold inthe manner shown in Fig. 4, said bushings fitting in upper andlower end caps 34, 35 respectively.

he upper cap has an opening or openings through. which the iuid corematerial is poured 1nto the mold. When the Huid core material is poured,the heat thereof serves to slightly fuse the inner surface of the facelayer, so that upon final solidication of the core a bond is formedbetween the core and face layer to hold the roller elements in fixedrelation to each other. Before the core is entirely solidified, thefrothy top of the material may be scooped out and more of the materialpoured in so that the core structure shall be lirm throughout. v

Thereafter, the completed roller is withdrawn from the mold. Before suchdrawing operation steam or hot water may be introduced into the steamjacket through an induction pipe 36 which, through the jacket` isexhausted through an exhaust pipe 37. The heat of the steam or water ismaintained until the paraflin is melted or partially melted. The top capand bushing are thereafter removed and the roller is then free to belifted out of the mold. While the roller compound is still as sulfurchlorid and is poured throughv the trough 22. Thereafter circulating It'is' to be understood that reference to vulcanization is intended tomean the hardening or partial hardening or solidiiication of the oil,without regard to the degree of hardening. -For example, thisvulcamzation may be carried to a point where the oil is as hard as hardleather, or to a point where it is just solid enough to withstanddeformation by gravity, or to any point therebetween.

I desire it to be understood that the invention is not limited to thespecic elements herein set forth, except as such elements aremade thesubject of specific claims, but that it is my intention to claim allofnovelty inherent in the roller herein described.

I claim as my invention l. A printers roller for the forth composed ofvulcanized oi l 2. A roller for the purpose set forth composed ofvulcanized oil having a surface which is more highly vulcanized than theinterior.v

3. A 'roller for the purpose set forth composedof vulcanized oil, havinga surface which is tougher than the interior.

4. A compound roller composed of an elastic vulcanized oil core and aface layer of a more highly vulcanized tough, homogeneous materialbonded to the core.

5. A roller for the purpose set forth made of a vulcanized oil andhaving a resilient body and a tough, homogeneous face free from gasesand moisture and having no afinity for moisture bonded to said body.

6. A roller for the purpose set forth comprising a core made of avulcanized oil and a face layer made also of vulcanized oil and 1purposeset more highly vulcanized than the core.

7. A compound roller comprising an outer face layer composed of a toughvulcanized oil compound, and a more resillentcore backing ofsubstantially the same material.

8. A'compound roller comprising an outer face layer com-posed of an -oilcompound mixed with a. vulcanizing agent, and a core backing ofvulcanized oil of resilient texture.

9. A compound roller comprising an outer layer composed of an oilcompound mixed with a vulcanizing agent, and with a core backing ofvulcanized oil.

In testimony that I claim the foregoing as my invention, I aflix mysignature in the presence of two witnesses, this 20th day of March,1915.

FRANKLIN H. WOLEVER.

Witnesses:

G. E.` DoWLE, WILLIAM L. HALL.

